(A) The use of heavy machinery for extraction and removal of natural material or deposits is permissible where such removal has been approved and authorized by permit.
(B) The land area exposed by the extraction and removal of natural material or deposits shall be left suitable for future use and development purposes in accordance with the final grading plan and in accordance with any zoning regulations applicable thereto.
(C) New excavation shall be a permissible use only in a zoning district wherein such use is permissible, subject to the provisions of this subchapter.
(D) An existing excavation for which a permit is issued pursuant to § 151.102, may be continued pursuant to such permit and shall not be construed to be a nonconforming use. Any proposed extension shall be treated as a new excavation.
('72 Code, § 10-93) (Ord. O-72-19, passed 2-2-72)